2 * Copyright (C) 2007 Oracle. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
19 #ifndef __BTRFS_CTREE__
20 #define __BTRFS_CTREE__
22 #include <linux/version.h>
24 #include <linux/highmem.h>
26 #include <linux/completion.h>
27 #include <linux/backing-dev.h>
28 #include <linux/wait.h>
29 #include <linux/slab.h>
30 #include <linux/kobject.h>
31 #include <asm/kmap_types.h>
32 #include "extent_io.h"
33 #include "extent_map.h"
34 #include "async-thread.h"
36 struct btrfs_trans_handle;
37 struct btrfs_transaction;
38 struct btrfs_pending_snapshot;
39 extern struct kmem_cache *btrfs_trans_handle_cachep;
40 extern struct kmem_cache *btrfs_transaction_cachep;
41 extern struct kmem_cache *btrfs_bit_radix_cachep;
42 extern struct kmem_cache *btrfs_path_cachep;
43 struct btrfs_ordered_sum;
45 #define BTRFS_MAGIC "_BHRfS_M"
47 #define BTRFS_MAX_LEVEL 8
49 #define BTRFS_COMPAT_EXTENT_TREE_V0
52 * files bigger than this get some pre-flushing when they are added
53 * to the ordered operations list. That way we limit the total
54 * work done by the commit
56 #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
58 /* holds pointers to all of the tree roots */
59 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
61 /* stores information about which extents are in use, and reference counts */
62 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
65 * chunk tree stores translations from logical -> physical block numbering
66 * the super block points to the chunk tree
68 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
71 * stores information about which areas of a given device are in use.
72 * one per device. The tree of tree roots points to the device tree
74 #define BTRFS_DEV_TREE_OBJECTID 4ULL
76 /* one per subvolume, storing files and directories */
77 #define BTRFS_FS_TREE_OBJECTID 5ULL
79 /* directory objectid inside the root tree */
80 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
82 /* holds checksums of all the data extents */
83 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
85 /* orhpan objectid for tracking unlinked/truncated files */
86 #define BTRFS_ORPHAN_OBJECTID -5ULL
88 /* does write ahead logging to speed up fsyncs */
89 #define BTRFS_TREE_LOG_OBJECTID -6ULL
90 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
92 /* for space balancing */
93 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
94 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
97 * extent checksums all have this objectid
98 * this allows them to share the logging tree
101 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
103 /* For storing free space cache */
104 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
106 /* dummy objectid represents multiple objectids */
107 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
110 * All files have objectids in this range.
112 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
113 #define BTRFS_LAST_FREE_OBJECTID -256ULL
114 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
118 * the device items go into the chunk tree. The key is in the form
119 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
121 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
123 #define BTRFS_BTREE_INODE_OBJECTID 1
125 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
128 * we can actually store much bigger names, but lets not confuse the rest
131 #define BTRFS_NAME_LEN 255
133 /* 32 bytes in various csum fields */
134 #define BTRFS_CSUM_SIZE 32
137 #define BTRFS_CSUM_TYPE_CRC32 0
139 static int btrfs_csum_sizes[] = { 4, 0 };
141 /* four bytes for CRC32 */
142 #define BTRFS_EMPTY_DIR_SIZE 0
144 #define BTRFS_FT_UNKNOWN 0
145 #define BTRFS_FT_REG_FILE 1
146 #define BTRFS_FT_DIR 2
147 #define BTRFS_FT_CHRDEV 3
148 #define BTRFS_FT_BLKDEV 4
149 #define BTRFS_FT_FIFO 5
150 #define BTRFS_FT_SOCK 6
151 #define BTRFS_FT_SYMLINK 7
152 #define BTRFS_FT_XATTR 8
153 #define BTRFS_FT_MAX 9
156 * The key defines the order in the tree, and so it also defines (optimal)
159 * objectid corresponds to the inode number.
161 * type tells us things about the object, and is a kind of stream selector.
162 * so for a given inode, keys with type of 1 might refer to the inode data,
163 * type of 2 may point to file data in the btree and type == 3 may point to
166 * offset is the starting byte offset for this key in the stream.
168 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
169 * in cpu native order. Otherwise they are identical and their sizes
170 * should be the same (ie both packed)
172 struct btrfs_disk_key {
176 } __attribute__ ((__packed__));
182 } __attribute__ ((__packed__));
184 struct btrfs_mapping_tree {
185 struct extent_map_tree map_tree;
188 #define BTRFS_UUID_SIZE 16
189 struct btrfs_dev_item {
190 /* the internal btrfs device id */
193 /* size of the device */
199 /* optimal io alignment for this device */
202 /* optimal io width for this device */
205 /* minimal io size for this device */
208 /* type and info about this device */
211 /* expected generation for this device */
215 * starting byte of this partition on the device,
216 * to allow for stripe alignment in the future
220 /* grouping information for allocation decisions */
223 /* seek speed 0-100 where 100 is fastest */
226 /* bandwidth 0-100 where 100 is fastest */
229 /* btrfs generated uuid for this device */
230 u8 uuid[BTRFS_UUID_SIZE];
232 /* uuid of FS who owns this device */
233 u8 fsid[BTRFS_UUID_SIZE];
234 } __attribute__ ((__packed__));
236 struct btrfs_stripe {
239 u8 dev_uuid[BTRFS_UUID_SIZE];
240 } __attribute__ ((__packed__));
243 /* size of this chunk in bytes */
246 /* objectid of the root referencing this chunk */
252 /* optimal io alignment for this chunk */
255 /* optimal io width for this chunk */
258 /* minimal io size for this chunk */
261 /* 2^16 stripes is quite a lot, a second limit is the size of a single
266 /* sub stripes only matter for raid10 */
268 struct btrfs_stripe stripe;
269 /* additional stripes go here */
270 } __attribute__ ((__packed__));
272 #define BTRFS_FREE_SPACE_EXTENT 1
273 #define BTRFS_FREE_SPACE_BITMAP 2
275 struct btrfs_free_space_entry {
279 } __attribute__ ((__packed__));
281 struct btrfs_free_space_header {
282 struct btrfs_disk_key location;
286 } __attribute__ ((__packed__));
288 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
290 BUG_ON(num_stripes == 0);
291 return sizeof(struct btrfs_chunk) +
292 sizeof(struct btrfs_stripe) * (num_stripes - 1);
295 #define BTRFS_FSID_SIZE 16
296 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
297 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
298 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
299 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
301 #define BTRFS_BACKREF_REV_MAX 256
302 #define BTRFS_BACKREF_REV_SHIFT 56
303 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
304 BTRFS_BACKREF_REV_SHIFT)
306 #define BTRFS_OLD_BACKREF_REV 0
307 #define BTRFS_MIXED_BACKREF_REV 1
310 * every tree block (leaf or node) starts with this header.
312 struct btrfs_header {
313 /* these first four must match the super block */
314 u8 csum[BTRFS_CSUM_SIZE];
315 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
316 __le64 bytenr; /* which block this node is supposed to live in */
319 /* allowed to be different from the super from here on down */
320 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
325 } __attribute__ ((__packed__));
327 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
328 sizeof(struct btrfs_header)) / \
329 sizeof(struct btrfs_key_ptr))
330 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
331 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
332 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
333 sizeof(struct btrfs_item) - \
334 sizeof(struct btrfs_file_extent_item))
335 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
336 sizeof(struct btrfs_item) -\
337 sizeof(struct btrfs_dir_item))
341 * this is a very generous portion of the super block, giving us
342 * room to translate 14 chunks with 3 stripes each.
344 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
345 #define BTRFS_LABEL_SIZE 256
348 * the super block basically lists the main trees of the FS
349 * it currently lacks any block count etc etc
351 struct btrfs_super_block {
352 u8 csum[BTRFS_CSUM_SIZE];
353 /* the first 4 fields must match struct btrfs_header */
354 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
355 __le64 bytenr; /* this block number */
358 /* allowed to be different from the btrfs_header from here own down */
365 /* this will help find the new super based on the log root */
366 __le64 log_root_transid;
369 __le64 root_dir_objectid;
375 __le32 sys_chunk_array_size;
376 __le64 chunk_root_generation;
378 __le64 compat_ro_flags;
379 __le64 incompat_flags;
384 struct btrfs_dev_item dev_item;
386 char label[BTRFS_LABEL_SIZE];
388 __le64 cache_generation;
390 /* future expansion */
392 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
393 } __attribute__ ((__packed__));
396 * Compat flags that we support. If any incompat flags are set other than the
397 * ones specified below then we will fail to mount
399 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
400 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
401 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
402 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
404 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
405 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
406 #define BTRFS_FEATURE_INCOMPAT_SUPP \
407 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
408 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
409 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
410 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO)
413 * A leaf is full of items. offset and size tell us where to find
414 * the item in the leaf (relative to the start of the data area)
417 struct btrfs_disk_key key;
420 } __attribute__ ((__packed__));
423 * leaves have an item area and a data area:
424 * [item0, item1....itemN] [free space] [dataN...data1, data0]
426 * The data is separate from the items to get the keys closer together
430 struct btrfs_header header;
431 struct btrfs_item items[];
432 } __attribute__ ((__packed__));
435 * all non-leaf blocks are nodes, they hold only keys and pointers to
438 struct btrfs_key_ptr {
439 struct btrfs_disk_key key;
442 } __attribute__ ((__packed__));
445 struct btrfs_header header;
446 struct btrfs_key_ptr ptrs[];
447 } __attribute__ ((__packed__));
450 * btrfs_paths remember the path taken from the root down to the leaf.
451 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
452 * to any other levels that are present.
454 * The slots array records the index of the item or block pointer
455 * used while walking the tree.
458 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
459 int slots[BTRFS_MAX_LEVEL];
460 /* if there is real range locking, this locks field will change */
461 int locks[BTRFS_MAX_LEVEL];
463 /* keep some upper locks as we walk down */
467 * set by btrfs_split_item, tells search_slot to keep all locks
468 * and to force calls to keep space in the nodes
470 unsigned int search_for_split:1;
471 unsigned int keep_locks:1;
472 unsigned int skip_locking:1;
473 unsigned int leave_spinning:1;
474 unsigned int search_commit_root:1;
478 * items in the extent btree are used to record the objectid of the
479 * owner of the block and the number of references
482 struct btrfs_extent_item {
486 } __attribute__ ((__packed__));
488 struct btrfs_extent_item_v0 {
490 } __attribute__ ((__packed__));
492 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
493 sizeof(struct btrfs_item))
495 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
496 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
498 /* following flags only apply to tree blocks */
500 /* use full backrefs for extent pointers in the block */
501 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
503 struct btrfs_tree_block_info {
504 struct btrfs_disk_key key;
506 } __attribute__ ((__packed__));
508 struct btrfs_extent_data_ref {
513 } __attribute__ ((__packed__));
515 struct btrfs_shared_data_ref {
517 } __attribute__ ((__packed__));
519 struct btrfs_extent_inline_ref {
522 } __attribute__ ((__packed__));
524 /* old style backrefs item */
525 struct btrfs_extent_ref_v0 {
530 } __attribute__ ((__packed__));
533 /* dev extents record free space on individual devices. The owner
534 * field points back to the chunk allocation mapping tree that allocated
535 * the extent. The chunk tree uuid field is a way to double check the owner
537 struct btrfs_dev_extent {
539 __le64 chunk_objectid;
542 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
543 } __attribute__ ((__packed__));
545 struct btrfs_inode_ref {
549 } __attribute__ ((__packed__));
551 struct btrfs_timespec {
554 } __attribute__ ((__packed__));
556 enum btrfs_compression_type {
557 BTRFS_COMPRESS_NONE = 0,
558 BTRFS_COMPRESS_ZLIB = 1,
559 BTRFS_COMPRESS_LZO = 2,
560 BTRFS_COMPRESS_TYPES = 2,
561 BTRFS_COMPRESS_LAST = 3,
564 struct btrfs_inode_item {
565 /* nfs style generation number */
567 /* transid that last touched this inode */
579 /* modification sequence number for NFS */
583 * a little future expansion, for more than this we can
584 * just grow the inode item and version it
587 struct btrfs_timespec atime;
588 struct btrfs_timespec ctime;
589 struct btrfs_timespec mtime;
590 struct btrfs_timespec otime;
591 } __attribute__ ((__packed__));
593 struct btrfs_dir_log_item {
595 } __attribute__ ((__packed__));
597 struct btrfs_dir_item {
598 struct btrfs_disk_key location;
603 } __attribute__ ((__packed__));
605 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
607 struct btrfs_root_item {
608 struct btrfs_inode_item inode;
614 __le64 last_snapshot;
617 struct btrfs_disk_key drop_progress;
620 } __attribute__ ((__packed__));
623 * this is used for both forward and backward root refs
625 struct btrfs_root_ref {
629 } __attribute__ ((__packed__));
631 #define BTRFS_FILE_EXTENT_INLINE 0
632 #define BTRFS_FILE_EXTENT_REG 1
633 #define BTRFS_FILE_EXTENT_PREALLOC 2
635 struct btrfs_file_extent_item {
637 * transaction id that created this extent
641 * max number of bytes to hold this extent in ram
642 * when we split a compressed extent we can't know how big
643 * each of the resulting pieces will be. So, this is
644 * an upper limit on the size of the extent in ram instead of
650 * 32 bits for the various ways we might encode the data,
651 * including compression and encryption. If any of these
652 * are set to something a given disk format doesn't understand
653 * it is treated like an incompat flag for reading and writing,
658 __le16 other_encoding; /* spare for later use */
660 /* are we inline data or a real extent? */
664 * disk space consumed by the extent, checksum blocks are included
668 __le64 disk_num_bytes;
670 * the logical offset in file blocks (no csums)
671 * this extent record is for. This allows a file extent to point
672 * into the middle of an existing extent on disk, sharing it
673 * between two snapshots (useful if some bytes in the middle of the
674 * extent have changed
678 * the logical number of file blocks (no csums included). This
679 * always reflects the size uncompressed and without encoding.
683 } __attribute__ ((__packed__));
685 struct btrfs_csum_item {
687 } __attribute__ ((__packed__));
689 /* different types of block groups (and chunks) */
690 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
691 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
692 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
693 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
694 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
695 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
696 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
697 #define BTRFS_NR_RAID_TYPES 5
699 struct btrfs_block_group_item {
701 __le64 chunk_objectid;
703 } __attribute__ ((__packed__));
705 struct btrfs_space_info {
708 u64 total_bytes; /* total bytes in the space,
709 this doesn't take mirrors into account */
710 u64 bytes_used; /* total bytes used,
711 this does't take mirrors into account */
712 u64 bytes_pinned; /* total bytes pinned, will be freed when the
713 transaction finishes */
714 u64 bytes_reserved; /* total bytes the allocator has reserved for
715 current allocations */
716 u64 bytes_readonly; /* total bytes that are read only */
718 u64 bytes_may_use; /* number of bytes that may be used for
719 delalloc/allocations */
720 u64 disk_used; /* total bytes used on disk */
721 u64 disk_total; /* total bytes on disk, takes mirrors into
724 int full; /* indicates that we cannot allocate any more
725 chunks for this space */
726 int force_alloc; /* set if we need to force a chunk alloc for
729 struct list_head list;
731 /* for block groups in our same type */
732 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
734 struct rw_semaphore groups_sem;
735 atomic_t caching_threads;
738 struct btrfs_block_rsv {
742 struct btrfs_space_info *space_info;
743 struct list_head list;
746 unsigned int priority:8;
747 unsigned int durable:1;
748 unsigned int refill_used:1;
753 * free clusters are used to claim free space in relatively large chunks,
754 * allowing us to do less seeky writes. They are used for all metadata
755 * allocations and data allocations in ssd mode.
757 struct btrfs_free_cluster {
759 spinlock_t refill_lock;
762 /* largest extent in this cluster */
765 /* first extent starting offset */
768 /* if this cluster simply points at a bitmap in the block group */
769 bool points_to_bitmap;
771 struct btrfs_block_group_cache *block_group;
773 * when a cluster is allocated from a block group, we put the
774 * cluster onto a list in the block group so that it can
775 * be freed before the block group is freed.
777 struct list_head block_group_list;
780 enum btrfs_caching_type {
782 BTRFS_CACHE_STARTED = 1,
783 BTRFS_CACHE_FINISHED = 2,
786 enum btrfs_disk_cache_state {
787 BTRFS_DC_WRITTEN = 0,
791 BTRFS_DC_NEED_WRITE = 4,
794 struct btrfs_caching_control {
795 struct list_head list;
797 wait_queue_head_t wait;
798 struct btrfs_block_group_cache *block_group;
803 struct btrfs_block_group_cache {
804 struct btrfs_key key;
805 struct btrfs_block_group_item item;
806 struct btrfs_fs_info *fs_info;
819 unsigned int dirty:1;
822 int disk_cache_state;
824 /* cache tracking stuff */
826 struct btrfs_caching_control *caching_ctl;
827 u64 last_byte_to_unpin;
829 struct btrfs_space_info *space_info;
831 /* free space cache stuff */
832 spinlock_t tree_lock;
833 struct rb_root free_space_offset;
836 /* block group cache stuff */
837 struct rb_node cache_node;
839 /* for block groups in the same raid type */
840 struct list_head list;
845 /* List of struct btrfs_free_clusters for this block group.
846 * Today it will only have one thing on it, but that may change
848 struct list_head cluster_list;
851 struct reloc_control;
853 struct btrfs_fs_devices;
854 struct btrfs_fs_info {
855 u8 fsid[BTRFS_FSID_SIZE];
856 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
857 struct btrfs_root *extent_root;
858 struct btrfs_root *tree_root;
859 struct btrfs_root *chunk_root;
860 struct btrfs_root *dev_root;
861 struct btrfs_root *fs_root;
862 struct btrfs_root *csum_root;
864 /* the log root tree is a directory of all the other log roots */
865 struct btrfs_root *log_root_tree;
867 spinlock_t fs_roots_radix_lock;
868 struct radix_tree_root fs_roots_radix;
870 /* block group cache stuff */
871 spinlock_t block_group_cache_lock;
872 struct rb_root block_group_cache_tree;
874 struct extent_io_tree freed_extents[2];
875 struct extent_io_tree *pinned_extents;
877 /* logical->physical extent mapping */
878 struct btrfs_mapping_tree mapping_tree;
880 /* block reservation for extent, checksum and root tree */
881 struct btrfs_block_rsv global_block_rsv;
882 /* block reservation for delay allocation */
883 struct btrfs_block_rsv delalloc_block_rsv;
884 /* block reservation for metadata operations */
885 struct btrfs_block_rsv trans_block_rsv;
886 /* block reservation for chunk tree */
887 struct btrfs_block_rsv chunk_block_rsv;
889 struct btrfs_block_rsv empty_block_rsv;
891 /* list of block reservations that cross multiple transactions */
892 struct list_head durable_block_rsv_list;
894 struct mutex durable_block_rsv_mutex;
897 u64 last_trans_committed;
900 * this is updated to the current trans every time a full commit
901 * is required instead of the faster short fsync log commits
903 u64 last_trans_log_full_commit;
904 u64 open_ioctl_trans;
905 unsigned long mount_opt:20;
906 unsigned long compress_type:4;
909 struct btrfs_transaction *running_transaction;
910 wait_queue_head_t transaction_throttle;
911 wait_queue_head_t transaction_wait;
912 wait_queue_head_t transaction_blocked_wait;
913 wait_queue_head_t async_submit_wait;
915 struct btrfs_super_block super_copy;
916 struct btrfs_super_block super_for_commit;
917 struct block_device *__bdev;
918 struct super_block *sb;
919 struct inode *btree_inode;
920 struct backing_dev_info bdi;
921 struct mutex trans_mutex;
922 struct mutex tree_log_mutex;
923 struct mutex transaction_kthread_mutex;
924 struct mutex cleaner_mutex;
925 struct mutex chunk_mutex;
926 struct mutex volume_mutex;
928 * this protects the ordered operations list only while we are
929 * processing all of the entries on it. This way we make
930 * sure the commit code doesn't find the list temporarily empty
931 * because another function happens to be doing non-waiting preflush
932 * before jumping into the main commit.
934 struct mutex ordered_operations_mutex;
935 struct rw_semaphore extent_commit_sem;
937 struct rw_semaphore cleanup_work_sem;
939 struct rw_semaphore subvol_sem;
940 struct srcu_struct subvol_srcu;
942 struct list_head trans_list;
943 struct list_head hashers;
944 struct list_head dead_roots;
945 struct list_head caching_block_groups;
947 spinlock_t delayed_iput_lock;
948 struct list_head delayed_iputs;
950 atomic_t nr_async_submits;
951 atomic_t async_submit_draining;
952 atomic_t nr_async_bios;
953 atomic_t async_delalloc_pages;
956 * this is used by the balancing code to wait for all the pending
959 spinlock_t ordered_extent_lock;
962 * all of the data=ordered extents pending writeback
963 * these can span multiple transactions and basically include
964 * every dirty data page that isn't from nodatacow
966 struct list_head ordered_extents;
969 * all of the inodes that have delalloc bytes. It is possible for
970 * this list to be empty even when there is still dirty data=ordered
971 * extents waiting to finish IO.
973 struct list_head delalloc_inodes;
976 * special rename and truncate targets that must be on disk before
977 * we're allowed to commit. This is basically the ext3 style
980 struct list_head ordered_operations;
983 * there is a pool of worker threads for checksumming during writes
984 * and a pool for checksumming after reads. This is because readers
985 * can run with FS locks held, and the writers may be waiting for
986 * those locks. We don't want ordering in the pending list to cause
987 * deadlocks, and so the two are serviced separately.
989 * A third pool does submit_bio to avoid deadlocking with the other
992 struct btrfs_workers generic_worker;
993 struct btrfs_workers workers;
994 struct btrfs_workers delalloc_workers;
995 struct btrfs_workers endio_workers;
996 struct btrfs_workers endio_meta_workers;
997 struct btrfs_workers endio_meta_write_workers;
998 struct btrfs_workers endio_write_workers;
999 struct btrfs_workers endio_freespace_worker;
1000 struct btrfs_workers submit_workers;
1002 * fixup workers take dirty pages that didn't properly go through
1003 * the cow mechanism and make them safe to write. It happens
1004 * for the sys_munmap function call path
1006 struct btrfs_workers fixup_workers;
1007 struct task_struct *transaction_kthread;
1008 struct task_struct *cleaner_kthread;
1009 int thread_pool_size;
1011 struct kobject super_kobj;
1012 struct completion kobj_unregister;
1015 int log_root_recovering;
1020 /* protected by the delalloc lock, used to keep from writing
1021 * metadata until there is a nice batch
1023 u64 dirty_metadata_bytes;
1024 struct list_head dirty_cowonly_roots;
1026 struct btrfs_fs_devices *fs_devices;
1029 * the space_info list is almost entirely read only. It only changes
1030 * when we add a new raid type to the FS, and that happens
1031 * very rarely. RCU is used to protect it.
1033 struct list_head space_info;
1035 struct reloc_control *reloc_ctl;
1037 spinlock_t delalloc_lock;
1038 spinlock_t new_trans_lock;
1041 /* data_alloc_cluster is only used in ssd mode */
1042 struct btrfs_free_cluster data_alloc_cluster;
1044 /* all metadata allocations go through this cluster */
1045 struct btrfs_free_cluster meta_alloc_cluster;
1047 spinlock_t ref_cache_lock;
1048 u64 total_ref_cache_size;
1050 u64 avail_data_alloc_bits;
1051 u64 avail_metadata_alloc_bits;
1052 u64 avail_system_alloc_bits;
1053 u64 data_alloc_profile;
1054 u64 metadata_alloc_profile;
1055 u64 system_alloc_profile;
1057 unsigned data_chunk_allocations;
1058 unsigned metadata_ratio;
1064 * in ram representation of the tree. extent_root is used for all allocations
1065 * and for the extent tree extent_root root.
1068 struct extent_buffer *node;
1070 /* the node lock is held while changing the node pointer */
1071 spinlock_t node_lock;
1073 struct extent_buffer *commit_root;
1074 struct btrfs_root *log_root;
1075 struct btrfs_root *reloc_root;
1077 struct btrfs_root_item root_item;
1078 struct btrfs_key root_key;
1079 struct btrfs_fs_info *fs_info;
1080 struct extent_io_tree dirty_log_pages;
1082 struct kobject root_kobj;
1083 struct completion kobj_unregister;
1084 struct mutex objectid_mutex;
1086 spinlock_t accounting_lock;
1087 struct btrfs_block_rsv *block_rsv;
1089 struct mutex log_mutex;
1090 wait_queue_head_t log_writer_wait;
1091 wait_queue_head_t log_commit_wait[2];
1092 atomic_t log_writers;
1093 atomic_t log_commit[2];
1094 unsigned long log_transid;
1095 unsigned long last_log_commit;
1096 unsigned long log_batch;
1097 pid_t log_start_pid;
1098 bool log_multiple_pids;
1103 /* data allocations are done in sectorsize units */
1106 /* node allocations are done in nodesize units */
1109 /* leaf allocations are done in leafsize units */
1116 u64 highest_objectid;
1121 u64 defrag_trans_start;
1122 struct btrfs_key defrag_progress;
1123 struct btrfs_key defrag_max;
1128 /* the dirty list is only used by non-reference counted roots */
1129 struct list_head dirty_list;
1131 struct list_head root_list;
1133 spinlock_t orphan_lock;
1134 struct list_head orphan_list;
1135 struct btrfs_block_rsv *orphan_block_rsv;
1136 int orphan_item_inserted;
1137 int orphan_cleanup_state;
1139 spinlock_t inode_lock;
1140 /* red-black tree that keeps track of in-memory inodes */
1141 struct rb_root inode_tree;
1144 * right now this just gets used so that a root has its own devid
1145 * for stat. It may be used for more later
1147 struct super_block anon_super;
1151 * inode items have the data typically returned from stat and store other
1152 * info about object characteristics. There is one for every file and dir in
1155 #define BTRFS_INODE_ITEM_KEY 1
1156 #define BTRFS_INODE_REF_KEY 12
1157 #define BTRFS_XATTR_ITEM_KEY 24
1158 #define BTRFS_ORPHAN_ITEM_KEY 48
1159 /* reserve 2-15 close to the inode for later flexibility */
1162 * dir items are the name -> inode pointers in a directory. There is one
1163 * for every name in a directory.
1165 #define BTRFS_DIR_LOG_ITEM_KEY 60
1166 #define BTRFS_DIR_LOG_INDEX_KEY 72
1167 #define BTRFS_DIR_ITEM_KEY 84
1168 #define BTRFS_DIR_INDEX_KEY 96
1170 * extent data is for file data
1172 #define BTRFS_EXTENT_DATA_KEY 108
1175 * extent csums are stored in a separate tree and hold csums for
1176 * an entire extent on disk.
1178 #define BTRFS_EXTENT_CSUM_KEY 128
1181 * root items point to tree roots. They are typically in the root
1182 * tree used by the super block to find all the other trees
1184 #define BTRFS_ROOT_ITEM_KEY 132
1187 * root backrefs tie subvols and snapshots to the directory entries that
1190 #define BTRFS_ROOT_BACKREF_KEY 144
1193 * root refs make a fast index for listing all of the snapshots and
1194 * subvolumes referenced by a given root. They point directly to the
1195 * directory item in the root that references the subvol
1197 #define BTRFS_ROOT_REF_KEY 156
1200 * extent items are in the extent map tree. These record which blocks
1201 * are used, and how many references there are to each block
1203 #define BTRFS_EXTENT_ITEM_KEY 168
1205 #define BTRFS_TREE_BLOCK_REF_KEY 176
1207 #define BTRFS_EXTENT_DATA_REF_KEY 178
1209 #define BTRFS_EXTENT_REF_V0_KEY 180
1211 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1213 #define BTRFS_SHARED_DATA_REF_KEY 184
1216 * block groups give us hints into the extent allocation trees. Which
1217 * blocks are free etc etc
1219 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1221 #define BTRFS_DEV_EXTENT_KEY 204
1222 #define BTRFS_DEV_ITEM_KEY 216
1223 #define BTRFS_CHUNK_ITEM_KEY 228
1226 * string items are for debugging. They just store a short string of
1229 #define BTRFS_STRING_ITEM_KEY 253
1231 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1232 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1233 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1234 #define BTRFS_MOUNT_SSD (1 << 3)
1235 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1236 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1237 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1238 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1239 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1240 #define BTRFS_MOUNT_NOSSD (1 << 9)
1241 #define BTRFS_MOUNT_DISCARD (1 << 10)
1242 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1243 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1244 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1245 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1247 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1248 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1249 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1254 #define BTRFS_INODE_NODATASUM (1 << 0)
1255 #define BTRFS_INODE_NODATACOW (1 << 1)
1256 #define BTRFS_INODE_READONLY (1 << 2)
1257 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1258 #define BTRFS_INODE_PREALLOC (1 << 4)
1259 #define BTRFS_INODE_SYNC (1 << 5)
1260 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1261 #define BTRFS_INODE_APPEND (1 << 7)
1262 #define BTRFS_INODE_NODUMP (1 << 8)
1263 #define BTRFS_INODE_NOATIME (1 << 9)
1264 #define BTRFS_INODE_DIRSYNC (1 << 10)
1266 /* some macros to generate set/get funcs for the struct fields. This
1267 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1270 #define le8_to_cpu(v) (v)
1271 #define cpu_to_le8(v) (v)
1274 #define read_eb_member(eb, ptr, type, member, result) ( \
1275 read_extent_buffer(eb, (char *)(result), \
1276 ((unsigned long)(ptr)) + \
1277 offsetof(type, member), \
1278 sizeof(((type *)0)->member)))
1280 #define write_eb_member(eb, ptr, type, member, result) ( \
1281 write_extent_buffer(eb, (char *)(result), \
1282 ((unsigned long)(ptr)) + \
1283 offsetof(type, member), \
1284 sizeof(((type *)0)->member)))
1286 #ifndef BTRFS_SETGET_FUNCS
1287 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1288 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1289 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1292 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1293 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1295 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1296 u##bits res = le##bits##_to_cpu(p->member); \
1297 kunmap_atomic(p, KM_USER0); \
1300 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1303 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1304 p->member = cpu_to_le##bits(val); \
1305 kunmap_atomic(p, KM_USER0); \
1308 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1309 static inline u##bits btrfs_##name(type *s) \
1311 return le##bits##_to_cpu(s->member); \
1313 static inline void btrfs_set_##name(type *s, u##bits val) \
1315 s->member = cpu_to_le##bits(val); \
1318 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1319 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1320 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1321 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1322 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1323 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1325 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1326 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1327 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1328 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1329 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1330 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1332 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1333 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1335 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1337 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1339 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1341 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1343 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1344 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1346 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1348 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1350 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1353 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1355 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1358 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1360 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1363 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1364 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1365 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1366 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1367 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1368 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1369 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1370 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1371 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1372 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1373 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1375 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1377 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1380 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1381 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1382 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1384 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1386 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1388 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1390 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1391 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1393 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1395 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1396 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1398 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1401 unsigned long offset = (unsigned long)c;
1402 offset += offsetof(struct btrfs_chunk, stripe);
1403 offset += nr * sizeof(struct btrfs_stripe);
1404 return (struct btrfs_stripe *)offset;
1407 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1409 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1412 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1413 struct btrfs_chunk *c, int nr)
1415 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1418 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1419 struct btrfs_chunk *c, int nr,
1422 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1425 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1426 struct btrfs_chunk *c, int nr)
1428 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1431 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1432 struct btrfs_chunk *c, int nr,
1435 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1438 /* struct btrfs_block_group_item */
1439 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1441 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1443 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1444 struct btrfs_block_group_item, chunk_objectid, 64);
1446 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1447 struct btrfs_block_group_item, chunk_objectid, 64);
1448 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1449 struct btrfs_block_group_item, flags, 64);
1450 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1451 struct btrfs_block_group_item, flags, 64);
1453 /* struct btrfs_inode_ref */
1454 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1455 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1457 /* struct btrfs_inode_item */
1458 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1459 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1460 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1461 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1462 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1463 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1464 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1465 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1466 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1467 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1468 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1469 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1471 static inline struct btrfs_timespec *
1472 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1474 unsigned long ptr = (unsigned long)inode_item;
1475 ptr += offsetof(struct btrfs_inode_item, atime);
1476 return (struct btrfs_timespec *)ptr;
1479 static inline struct btrfs_timespec *
1480 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1482 unsigned long ptr = (unsigned long)inode_item;
1483 ptr += offsetof(struct btrfs_inode_item, mtime);
1484 return (struct btrfs_timespec *)ptr;
1487 static inline struct btrfs_timespec *
1488 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1490 unsigned long ptr = (unsigned long)inode_item;
1491 ptr += offsetof(struct btrfs_inode_item, ctime);
1492 return (struct btrfs_timespec *)ptr;
1495 static inline struct btrfs_timespec *
1496 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1498 unsigned long ptr = (unsigned long)inode_item;
1499 ptr += offsetof(struct btrfs_inode_item, otime);
1500 return (struct btrfs_timespec *)ptr;
1503 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1504 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1506 /* struct btrfs_dev_extent */
1507 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1509 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1510 chunk_objectid, 64);
1511 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1513 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1515 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1517 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1518 return (u8 *)((unsigned long)dev + ptr);
1521 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1522 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1524 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1526 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1529 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1531 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1532 struct btrfs_tree_block_info *item,
1533 struct btrfs_disk_key *key)
1535 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1538 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1539 struct btrfs_tree_block_info *item,
1540 struct btrfs_disk_key *key)
1542 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1545 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1547 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1549 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1551 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1554 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1557 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1559 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1562 static inline u32 btrfs_extent_inline_ref_size(int type)
1564 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1565 type == BTRFS_SHARED_BLOCK_REF_KEY)
1566 return sizeof(struct btrfs_extent_inline_ref);
1567 if (type == BTRFS_SHARED_DATA_REF_KEY)
1568 return sizeof(struct btrfs_shared_data_ref) +
1569 sizeof(struct btrfs_extent_inline_ref);
1570 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1571 return sizeof(struct btrfs_extent_data_ref) +
1572 offsetof(struct btrfs_extent_inline_ref, offset);
1577 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1578 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1580 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1581 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1583 /* struct btrfs_node */
1584 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1585 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1587 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1590 ptr = offsetof(struct btrfs_node, ptrs) +
1591 sizeof(struct btrfs_key_ptr) * nr;
1592 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1595 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1599 ptr = offsetof(struct btrfs_node, ptrs) +
1600 sizeof(struct btrfs_key_ptr) * nr;
1601 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1604 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1607 ptr = offsetof(struct btrfs_node, ptrs) +
1608 sizeof(struct btrfs_key_ptr) * nr;
1609 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1612 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1616 ptr = offsetof(struct btrfs_node, ptrs) +
1617 sizeof(struct btrfs_key_ptr) * nr;
1618 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1621 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1623 return offsetof(struct btrfs_node, ptrs) +
1624 sizeof(struct btrfs_key_ptr) * nr;
1627 void btrfs_node_key(struct extent_buffer *eb,
1628 struct btrfs_disk_key *disk_key, int nr);
1630 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1631 struct btrfs_disk_key *disk_key, int nr)
1634 ptr = btrfs_node_key_ptr_offset(nr);
1635 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1636 struct btrfs_key_ptr, key, disk_key);
1639 /* struct btrfs_item */
1640 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1641 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1643 static inline unsigned long btrfs_item_nr_offset(int nr)
1645 return offsetof(struct btrfs_leaf, items) +
1646 sizeof(struct btrfs_item) * nr;
1649 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1652 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1655 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1656 struct btrfs_item *item)
1658 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1661 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1663 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1666 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1668 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1671 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1673 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1676 static inline void btrfs_item_key(struct extent_buffer *eb,
1677 struct btrfs_disk_key *disk_key, int nr)
1679 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1680 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1683 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1684 struct btrfs_disk_key *disk_key, int nr)
1686 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1687 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1690 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1693 * struct btrfs_root_ref
1695 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1696 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1697 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1699 /* struct btrfs_dir_item */
1700 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1701 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1702 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1703 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1705 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1706 struct btrfs_dir_item *item,
1707 struct btrfs_disk_key *key)
1709 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1712 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1713 struct btrfs_dir_item *item,
1714 struct btrfs_disk_key *key)
1716 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1719 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1721 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1723 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1726 static inline void btrfs_free_space_key(struct extent_buffer *eb,
1727 struct btrfs_free_space_header *h,
1728 struct btrfs_disk_key *key)
1730 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1733 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1734 struct btrfs_free_space_header *h,
1735 struct btrfs_disk_key *key)
1737 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1740 /* struct btrfs_disk_key */
1741 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1743 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1744 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1746 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1747 struct btrfs_disk_key *disk)
1749 cpu->offset = le64_to_cpu(disk->offset);
1750 cpu->type = disk->type;
1751 cpu->objectid = le64_to_cpu(disk->objectid);
1754 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1755 struct btrfs_key *cpu)
1757 disk->offset = cpu_to_le64(cpu->offset);
1758 disk->type = cpu->type;
1759 disk->objectid = cpu_to_le64(cpu->objectid);
1762 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1763 struct btrfs_key *key, int nr)
1765 struct btrfs_disk_key disk_key;
1766 btrfs_node_key(eb, &disk_key, nr);
1767 btrfs_disk_key_to_cpu(key, &disk_key);
1770 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1771 struct btrfs_key *key, int nr)
1773 struct btrfs_disk_key disk_key;
1774 btrfs_item_key(eb, &disk_key, nr);
1775 btrfs_disk_key_to_cpu(key, &disk_key);
1778 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1779 struct btrfs_dir_item *item,
1780 struct btrfs_key *key)
1782 struct btrfs_disk_key disk_key;
1783 btrfs_dir_item_key(eb, item, &disk_key);
1784 btrfs_disk_key_to_cpu(key, &disk_key);
1788 static inline u8 btrfs_key_type(struct btrfs_key *key)
1793 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1798 /* struct btrfs_header */
1799 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1800 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1802 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1803 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1804 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1805 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1807 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1809 return (btrfs_header_flags(eb) & flag) == flag;
1812 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1814 u64 flags = btrfs_header_flags(eb);
1815 btrfs_set_header_flags(eb, flags | flag);
1816 return (flags & flag) == flag;
1819 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1821 u64 flags = btrfs_header_flags(eb);
1822 btrfs_set_header_flags(eb, flags & ~flag);
1823 return (flags & flag) == flag;
1826 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
1828 u64 flags = btrfs_header_flags(eb);
1829 return flags >> BTRFS_BACKREF_REV_SHIFT;
1832 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
1835 u64 flags = btrfs_header_flags(eb);
1836 flags &= ~BTRFS_BACKREF_REV_MASK;
1837 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
1838 btrfs_set_header_flags(eb, flags);
1841 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1843 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1847 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1849 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1853 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1855 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1859 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1861 unsigned long ptr = offsetof(struct btrfs_header, csum);
1865 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1870 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1875 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1880 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1882 return btrfs_header_level(eb) == 0;
1885 /* struct btrfs_root_item */
1886 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1888 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1889 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1890 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1892 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1894 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1895 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1896 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1897 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1898 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1899 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1900 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1901 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1904 static inline bool btrfs_root_readonly(struct btrfs_root *root)
1906 return root->root_item.flags & BTRFS_ROOT_SUBVOL_RDONLY;
1909 /* struct btrfs_super_block */
1911 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1912 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1913 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1915 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1916 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1917 struct btrfs_super_block, sys_chunk_array_size, 32);
1918 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
1919 struct btrfs_super_block, chunk_root_generation, 64);
1920 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1922 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1924 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1925 chunk_root_level, 8);
1926 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1928 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
1929 log_root_transid, 64);
1930 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1932 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1934 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1936 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1938 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1940 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1942 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1944 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1945 root_dir_objectid, 64);
1946 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1948 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
1950 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
1951 compat_ro_flags, 64);
1952 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
1953 incompat_flags, 64);
1954 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
1956 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
1957 cache_generation, 64);
1959 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
1961 int t = btrfs_super_csum_type(s);
1962 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
1963 return btrfs_csum_sizes[t];
1966 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1968 return offsetof(struct btrfs_leaf, items);
1971 /* struct btrfs_file_extent_item */
1972 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1974 static inline unsigned long
1975 btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
1977 unsigned long offset = (unsigned long)e;
1978 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1982 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1984 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1987 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1989 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1991 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1992 disk_num_bytes, 64);
1993 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1995 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1997 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
1999 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2001 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2003 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2004 other_encoding, 16);
2006 /* this returns the number of file bytes represented by the inline item.
2007 * If an item is compressed, this is the uncompressed size
2009 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2010 struct btrfs_file_extent_item *e)
2012 return btrfs_file_extent_ram_bytes(eb, e);
2016 * this returns the number of bytes used by the item on disk, minus the
2017 * size of any extent headers. If a file is compressed on disk, this is
2018 * the compressed size
2020 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2021 struct btrfs_item *e)
2023 unsigned long offset;
2024 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2025 return btrfs_item_size(eb, e) - offset;
2028 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
2030 return sb->s_fs_info;
2033 static inline int btrfs_set_root_name(struct btrfs_root *root,
2034 const char *name, int len)
2036 /* if we already have a name just free it */
2039 root->name = kmalloc(len+1, GFP_KERNEL);
2043 memcpy(root->name, name, len);
2044 root->name[len] = '\0';
2049 static inline u32 btrfs_level_size(struct btrfs_root *root, int level)
2052 return root->leafsize;
2053 return root->nodesize;
2056 /* helper function to cast into the data area of the leaf. */
2057 #define btrfs_item_ptr(leaf, slot, type) \
2058 ((type *)(btrfs_leaf_data(leaf) + \
2059 btrfs_item_offset_nr(leaf, slot)))
2061 #define btrfs_item_ptr_offset(leaf, slot) \
2062 ((unsigned long)(btrfs_leaf_data(leaf) + \
2063 btrfs_item_offset_nr(leaf, slot)))
2065 static inline struct dentry *fdentry(struct file *file)
2067 return file->f_path.dentry;
2070 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
2072 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
2073 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
2077 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2078 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2079 struct btrfs_root *root, unsigned long count);
2080 int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
2081 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2082 struct btrfs_root *root, u64 bytenr,
2083 u64 num_bytes, u64 *refs, u64 *flags);
2084 int btrfs_pin_extent(struct btrfs_root *root,
2085 u64 bytenr, u64 num, int reserved);
2086 int btrfs_drop_leaf_ref(struct btrfs_trans_handle *trans,
2087 struct btrfs_root *root, struct extent_buffer *leaf);
2088 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
2089 struct btrfs_root *root,
2090 u64 objectid, u64 offset, u64 bytenr);
2091 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
2092 struct btrfs_block_group_cache *btrfs_lookup_block_group(
2093 struct btrfs_fs_info *info,
2095 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2096 u64 btrfs_find_block_group(struct btrfs_root *root,
2097 u64 search_start, u64 search_hint, int owner);
2098 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2099 struct btrfs_root *root, u32 blocksize,
2100 u64 parent, u64 root_objectid,
2101 struct btrfs_disk_key *key, int level,
2102 u64 hint, u64 empty_size);
2103 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2104 struct btrfs_root *root,
2105 struct extent_buffer *buf,
2106 u64 parent, int last_ref);
2107 struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
2108 struct btrfs_root *root,
2109 u64 bytenr, u32 blocksize,
2111 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2112 struct btrfs_root *root,
2113 u64 root_objectid, u64 owner,
2114 u64 offset, struct btrfs_key *ins);
2115 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2116 struct btrfs_root *root,
2117 u64 root_objectid, u64 owner, u64 offset,
2118 struct btrfs_key *ins);
2119 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
2120 struct btrfs_root *root,
2121 u64 num_bytes, u64 min_alloc_size,
2122 u64 empty_size, u64 hint_byte,
2123 u64 search_end, struct btrfs_key *ins,
2125 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2126 struct extent_buffer *buf, int full_backref);
2127 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2128 struct extent_buffer *buf, int full_backref);
2129 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2130 struct btrfs_root *root,
2131 u64 bytenr, u64 num_bytes, u64 flags,
2133 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2134 struct btrfs_root *root,
2135 u64 bytenr, u64 num_bytes, u64 parent,
2136 u64 root_objectid, u64 owner, u64 offset);
2138 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
2139 int btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
2140 struct btrfs_root *root);
2141 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2142 struct btrfs_root *root);
2143 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2144 struct btrfs_root *root,
2145 u64 bytenr, u64 num_bytes, u64 parent,
2146 u64 root_objectid, u64 owner, u64 offset);
2148 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2149 struct btrfs_root *root);
2150 int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
2151 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2152 int btrfs_read_block_groups(struct btrfs_root *root);
2153 int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
2154 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2155 struct btrfs_root *root, u64 bytes_used,
2156 u64 type, u64 chunk_objectid, u64 chunk_offset,
2158 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
2159 struct btrfs_root *root, u64 group_start);
2160 u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
2161 void btrfs_set_inode_space_info(struct btrfs_root *root, struct inode *ionde);
2162 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2163 int btrfs_check_data_free_space(struct inode *inode, u64 bytes);
2164 void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes);
2165 int btrfs_trans_reserve_metadata(struct btrfs_trans_handle *trans,
2166 struct btrfs_root *root,
2168 void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
2169 struct btrfs_root *root);
2170 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
2171 struct inode *inode);
2172 void btrfs_orphan_release_metadata(struct inode *inode);
2173 int btrfs_snap_reserve_metadata(struct btrfs_trans_handle *trans,
2174 struct btrfs_pending_snapshot *pending);
2175 int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
2176 void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
2177 int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes);
2178 void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes);
2179 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv);
2180 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root);
2181 void btrfs_free_block_rsv(struct btrfs_root *root,
2182 struct btrfs_block_rsv *rsv);
2183 void btrfs_add_durable_block_rsv(struct btrfs_fs_info *fs_info,
2184 struct btrfs_block_rsv *rsv);
2185 int btrfs_block_rsv_add(struct btrfs_trans_handle *trans,
2186 struct btrfs_root *root,
2187 struct btrfs_block_rsv *block_rsv,
2189 int btrfs_block_rsv_check(struct btrfs_trans_handle *trans,
2190 struct btrfs_root *root,
2191 struct btrfs_block_rsv *block_rsv,
2192 u64 min_reserved, int min_factor);
2193 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
2194 struct btrfs_block_rsv *dst_rsv,
2196 void btrfs_block_rsv_release(struct btrfs_root *root,
2197 struct btrfs_block_rsv *block_rsv,
2199 int btrfs_set_block_group_ro(struct btrfs_root *root,
2200 struct btrfs_block_group_cache *cache);
2201 int btrfs_set_block_group_rw(struct btrfs_root *root,
2202 struct btrfs_block_group_cache *cache);
2203 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
2205 int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
2206 int level, int *slot);
2207 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
2208 int btrfs_previous_item(struct btrfs_root *root,
2209 struct btrfs_path *path, u64 min_objectid,
2211 int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
2212 struct btrfs_root *root, struct btrfs_path *path,
2213 struct btrfs_key *new_key);
2214 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2215 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2216 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2217 struct btrfs_key *key, int lowest_level,
2218 int cache_only, u64 min_trans);
2219 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2220 struct btrfs_key *max_key,
2221 struct btrfs_path *path, int cache_only,
2223 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2224 struct btrfs_root *root, struct extent_buffer *buf,
2225 struct extent_buffer *parent, int parent_slot,
2226 struct extent_buffer **cow_ret);
2227 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2228 struct btrfs_root *root,
2229 struct extent_buffer *buf,
2230 struct extent_buffer **cow_ret, u64 new_root_objectid);
2231 int btrfs_block_can_be_shared(struct btrfs_root *root,
2232 struct extent_buffer *buf);
2233 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
2234 *root, struct btrfs_path *path, u32 data_size);
2235 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
2236 struct btrfs_root *root,
2237 struct btrfs_path *path,
2238 u32 new_size, int from_end);
2239 int btrfs_split_item(struct btrfs_trans_handle *trans,
2240 struct btrfs_root *root,
2241 struct btrfs_path *path,
2242 struct btrfs_key *new_key,
2243 unsigned long split_offset);
2244 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2245 struct btrfs_root *root,
2246 struct btrfs_path *path,
2247 struct btrfs_key *new_key);
2248 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2249 *root, struct btrfs_key *key, struct btrfs_path *p, int
2251 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2252 struct btrfs_root *root, struct extent_buffer *parent,
2253 int start_slot, int cache_only, u64 *last_ret,
2254 struct btrfs_key *progress);
2255 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
2256 struct btrfs_path *btrfs_alloc_path(void);
2257 void btrfs_free_path(struct btrfs_path *p);
2258 void btrfs_set_path_blocking(struct btrfs_path *p);
2259 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
2261 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2262 struct btrfs_path *path, int slot, int nr);
2263 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2264 struct btrfs_root *root,
2265 struct btrfs_path *path)
2267 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2270 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2271 *root, struct btrfs_key *key, void *data, u32 data_size);
2272 int btrfs_insert_some_items(struct btrfs_trans_handle *trans,
2273 struct btrfs_root *root,
2274 struct btrfs_path *path,
2275 struct btrfs_key *cpu_key, u32 *data_size,
2277 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2278 struct btrfs_root *root,
2279 struct btrfs_path *path,
2280 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2282 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2283 struct btrfs_root *root,
2284 struct btrfs_path *path,
2285 struct btrfs_key *key,
2288 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2291 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2292 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2293 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2294 int btrfs_drop_snapshot(struct btrfs_root *root,
2295 struct btrfs_block_rsv *block_rsv, int update_ref);
2296 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2297 struct btrfs_root *root,
2298 struct extent_buffer *node,
2299 struct extent_buffer *parent);
2301 int btrfs_find_root_ref(struct btrfs_root *tree_root,
2302 struct btrfs_path *path,
2303 u64 root_id, u64 ref_id);
2304 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2305 struct btrfs_root *tree_root,
2306 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
2307 const char *name, int name_len);
2308 int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
2309 struct btrfs_root *tree_root,
2310 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
2311 const char *name, int name_len);
2312 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2313 struct btrfs_key *key);
2314 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2315 *root, struct btrfs_key *key, struct btrfs_root_item
2317 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
2318 *root, struct btrfs_key *key, struct btrfs_root_item
2320 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2321 btrfs_root_item *item, struct btrfs_key *key);
2322 int btrfs_search_root(struct btrfs_root *root, u64 search_start,
2323 u64 *found_objectid);
2324 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid);
2325 int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
2326 int btrfs_set_root_node(struct btrfs_root_item *item,
2327 struct extent_buffer *node);
2329 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
2330 struct btrfs_root *root, const char *name,
2331 int name_len, u64 dir,
2332 struct btrfs_key *location, u8 type, u64 index);
2333 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2334 struct btrfs_root *root,
2335 struct btrfs_path *path, u64 dir,
2336 const char *name, int name_len,
2338 struct btrfs_dir_item *
2339 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
2340 struct btrfs_root *root,
2341 struct btrfs_path *path, u64 dir,
2342 u64 objectid, const char *name, int name_len,
2344 struct btrfs_dir_item *
2345 btrfs_search_dir_index_item(struct btrfs_root *root,
2346 struct btrfs_path *path, u64 dirid,
2347 const char *name, int name_len);
2348 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
2349 struct btrfs_path *path,
2350 const char *name, int name_len);
2351 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2352 struct btrfs_root *root,
2353 struct btrfs_path *path,
2354 struct btrfs_dir_item *di);
2355 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2356 struct btrfs_root *root,
2357 struct btrfs_path *path, u64 objectid,
2358 const char *name, u16 name_len,
2359 const void *data, u16 data_len);
2360 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
2361 struct btrfs_root *root,
2362 struct btrfs_path *path, u64 dir,
2363 const char *name, u16 name_len,
2367 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
2368 struct btrfs_root *root, u64 offset);
2369 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
2370 struct btrfs_root *root, u64 offset);
2371 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
2374 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
2375 struct btrfs_root *fs_root,
2376 u64 dirid, u64 *objectid);
2377 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
2380 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2381 struct btrfs_root *root,
2382 const char *name, int name_len,
2383 u64 inode_objectid, u64 ref_objectid, u64 index);
2384 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2385 struct btrfs_root *root,
2386 const char *name, int name_len,
2387 u64 inode_objectid, u64 ref_objectid, u64 *index);
2388 struct btrfs_inode_ref *
2389 btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans,
2390 struct btrfs_root *root,
2391 struct btrfs_path *path,
2392 const char *name, int name_len,
2393 u64 inode_objectid, u64 ref_objectid, int mod);
2394 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
2395 struct btrfs_root *root,
2396 struct btrfs_path *path, u64 objectid);
2397 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2398 *root, struct btrfs_path *path,
2399 struct btrfs_key *location, int mod);
2402 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2403 struct btrfs_root *root, u64 bytenr, u64 len);
2404 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
2405 struct bio *bio, u32 *dst);
2406 int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
2407 struct bio *bio, u64 logical_offset, u32 *dst);
2408 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2409 struct btrfs_root *root,
2410 u64 objectid, u64 pos,
2411 u64 disk_offset, u64 disk_num_bytes,
2412 u64 num_bytes, u64 offset, u64 ram_bytes,
2413 u8 compression, u8 encryption, u16 other_encoding);
2414 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
2415 struct btrfs_root *root,
2416 struct btrfs_path *path, u64 objectid,
2417 u64 bytenr, int mod);
2418 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
2419 struct btrfs_root *root,
2420 struct btrfs_ordered_sum *sums);
2421 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
2422 struct bio *bio, u64 file_start, int contig);
2423 int btrfs_csum_file_bytes(struct btrfs_root *root, struct inode *inode,
2424 u64 start, unsigned long len);
2425 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
2426 struct btrfs_root *root,
2427 struct btrfs_path *path,
2428 u64 bytenr, int cow);
2429 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2430 struct btrfs_root *root, struct btrfs_path *path,
2432 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start,
2433 u64 end, struct list_head *list);
2436 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
2437 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2438 #define ClearPageChecked ClearPageFsMisc
2439 #define SetPageChecked SetPageFsMisc
2440 #define PageChecked PageFsMisc
2443 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
2444 int btrfs_set_inode_index(struct inode *dir, u64 *index);
2445 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
2446 struct btrfs_root *root,
2447 struct inode *dir, struct inode *inode,
2448 const char *name, int name_len);
2449 int btrfs_add_link(struct btrfs_trans_handle *trans,
2450 struct inode *parent_inode, struct inode *inode,
2451 const char *name, int name_len, int add_backref, u64 index);
2452 int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
2453 struct btrfs_root *root,
2454 struct inode *dir, u64 objectid,
2455 const char *name, int name_len);
2456 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
2457 struct btrfs_root *root,
2458 struct inode *inode, u64 new_size,
2461 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
2462 int btrfs_start_one_delalloc_inode(struct btrfs_root *root, int delay_iput,
2464 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
2465 struct extent_state **cached_state);
2466 int btrfs_writepages(struct address_space *mapping,
2467 struct writeback_control *wbc);
2468 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
2469 struct btrfs_root *new_root,
2470 u64 new_dirid, u64 alloc_hint);
2471 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
2472 size_t size, struct bio *bio, unsigned long bio_flags);
2474 unsigned long btrfs_force_ra(struct address_space *mapping,
2475 struct file_ra_state *ra, struct file *file,
2476 pgoff_t offset, pgoff_t last_index);
2477 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
2478 int btrfs_readpage(struct file *file, struct page *page);
2479 void btrfs_evict_inode(struct inode *inode);
2480 void btrfs_put_inode(struct inode *inode);
2481 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
2482 void btrfs_dirty_inode(struct inode *inode);
2483 struct inode *btrfs_alloc_inode(struct super_block *sb);
2484 void btrfs_destroy_inode(struct inode *inode);
2485 int btrfs_drop_inode(struct inode *inode);
2486 int btrfs_init_cachep(void);
2487 void btrfs_destroy_cachep(void);
2488 long btrfs_ioctl_trans_end(struct file *file);
2489 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
2490 struct btrfs_root *root, int *was_new);
2491 int btrfs_commit_write(struct file *file, struct page *page,
2492 unsigned from, unsigned to);
2493 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
2494 size_t page_offset, u64 start, u64 end,
2496 int btrfs_update_inode(struct btrfs_trans_handle *trans,
2497 struct btrfs_root *root,
2498 struct inode *inode);
2499 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
2500 int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
2501 void btrfs_orphan_cleanup(struct btrfs_root *root);
2502 void btrfs_orphan_pre_snapshot(struct btrfs_trans_handle *trans,
2503 struct btrfs_pending_snapshot *pending,
2504 u64 *bytes_to_reserve);
2505 void btrfs_orphan_post_snapshot(struct btrfs_trans_handle *trans,
2506 struct btrfs_pending_snapshot *pending);
2507 void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
2508 struct btrfs_root *root);
2509 int btrfs_cont_expand(struct inode *inode, loff_t size);
2510 int btrfs_invalidate_inodes(struct btrfs_root *root);
2511 void btrfs_add_delayed_iput(struct inode *inode);
2512 void btrfs_run_delayed_iputs(struct btrfs_root *root);
2513 int btrfs_prealloc_file_range(struct inode *inode, int mode,
2514 u64 start, u64 num_bytes, u64 min_size,
2515 loff_t actual_len, u64 *alloc_hint);
2516 int btrfs_prealloc_file_range_trans(struct inode *inode,
2517 struct btrfs_trans_handle *trans, int mode,
2518 u64 start, u64 num_bytes, u64 min_size,
2519 loff_t actual_len, u64 *alloc_hint);
2520 extern const struct dentry_operations btrfs_dentry_operations;
2523 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
2524 void btrfs_update_iflags(struct inode *inode);
2525 void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
2528 int btrfs_sync_file(struct file *file, int datasync);
2529 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
2531 int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
2532 extern const struct file_operations btrfs_file_operations;
2533 int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode,
2534 u64 start, u64 end, u64 *hint_byte, int drop_cache);
2535 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
2536 struct inode *inode, u64 start, u64 end);
2537 int btrfs_release_file(struct inode *inode, struct file *file);
2540 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
2541 struct btrfs_root *root, int cache_only);
2544 int btrfs_init_sysfs(void);
2545 void btrfs_exit_sysfs(void);
2546 int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
2547 int btrfs_sysfs_add_root(struct btrfs_root *root);
2548 void btrfs_sysfs_del_root(struct btrfs_root *root);
2549 void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
2552 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
2555 int btrfs_parse_options(struct btrfs_root *root, char *options);
2556 int btrfs_sync_fs(struct super_block *sb, int wait);
2559 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
2560 int btrfs_check_acl(struct inode *inode, int mask);
2562 #define btrfs_check_acl NULL
2564 int btrfs_init_acl(struct btrfs_trans_handle *trans,
2565 struct inode *inode, struct inode *dir);
2566 int btrfs_acl_chmod(struct inode *inode);
2569 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
2570 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
2571 struct btrfs_root *root);
2572 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
2573 struct btrfs_root *root);
2574 int btrfs_recover_relocation(struct btrfs_root *root);
2575 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
2576 void btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
2577 struct btrfs_root *root, struct extent_buffer *buf,
2578 struct extent_buffer *cow);
2579 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans,
2580 struct btrfs_pending_snapshot *pending,
2581 u64 *bytes_to_reserve);
2582 void btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
2583 struct btrfs_pending_snapshot *pending);